Cross sections for the production of excited states by neutron inelastic scattering were measured as a function of bombarding energy from 0 to 300 keV above threshold for the first two excited states of Fe 56 , the first two excited states of Cu 63 , the first excited state of Zr 90 , the first two excited states of Ba 138 , and the first three excited states of Ce 140 . Neutron-beam energy resolution was 10-20 keV. Inelastic-scattering events were counted by detecting gamma rays from the excited states. When the number of open channels for compoundnucleus decay is small, (a condition which exists near threshold for exciting low-lying states) fluctuations of reaction widths about their average values reduce the inelastic-scattering cross section from that predicted by the Hauser-Feshbach equation by as much as 50%. This correction was evaluated, assuming a PorterThomas distribution of widths. Good agreement was found between experimental cross sections and the modified Hauser-Feshbach equation in all but two cases.

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This chapter covers the definition, causes, and management of sweating and fever.